Finding the Fourth Proportional to 37,007.80, 55,499.55 and 13,631.20

Step by Step Solution

1. Step 1: Write the proportion equation
   37,007.80 : 55,499.55 = 13,631.20 : x
2. Step 2: Convert to fraction form
   37,007.80/55,499.55 = 13,631.20/x
3. Step 3: Cross multiply
   37,007.80x = 55,499.55 × 13,631.20
4. Step 4: Simplify right side
   37,007.80x = 756,525,465.96
5. Step 5: Solve for x
   x = 756,525,465.96/37,007.80
6. Step 6: Final answer
   x = 20,442.32